TY  - BOOK
AU  - DONALD P HOPKINS
TI  - CHEMICALS HUMUS AND THE SOIL
U1  - GN 631.41 H 774 
PY  - 1956///
CY  - LONDON
PB  - FABER AND FABER LIMITED
KW  - THE SOILS
N1  - BANWARI LAL
ER  -